Cameroon has several dams on the Benue River, which flows downstream to Nigeria.
More than 30 people have been killed by the floods, which authorities say affected about one million people.
The floods in West Africa come at a time of flooding in Europe after days of torrential rain that caused rivers to burst their banks in several parts of the region.
The three junta-led Sahel neighbours jointly announced in January they would leave the 15-member Economic Community of West African States (ECOWAS), which has sought to persuade them to reconsider their decision.
The flood has killed at least 30 people, according to the country's emergency agency, and affected a million others.
Some 800,000 people in 29 states in Nigeria have been affected by floods as of September 2024, WFP said.
Floods began when a dam overflowed following heavy rains, uprooting thousands of people.
Tebboune's re-election means Algeria will likely keep on with a governing programme that has resumed lavish social spending.
Already on Monday, Nigeria charged 10 people with treason and conspiring to incite the military to mutiny.
Heavy rains have added to problems in the farming sector where farmers are deserting their farms in the northeast due to repeated attacks by militants.
The victims, who were medical and dental students, were headed to the southeastern state of Enugu, the police said.
Across Africa - and a string of other emerging market nations - debt-laden governments trying to shed costly fuel subsidies are running headlong into angry populations reeling from years of increasing living costs.
In Nigeria, inflation has spiked above 34 per cent following the removal of a costly fuel subsidy and unsuccessful currency devaluations.
Hundreds of thousands of Nigerians have been protesting since August 1 against Tinubu's painful economic reforms that have seen a partial end to petrol and electricity subsidies, currency devaluation and inflation touching three-decade highs.
The United Nations is following the situation in Bangladesh very closely after Prime Minister Sheikh Hasina resigned and fled the country on Monday.
Sheikh Hasina, who has served consecutively since January 2009, has now been ousted.
In a televised broadcast, Tinubu called for an end to violence in several states since the protests started, saying he was always open to dialogue.
At least 13 people were killed on Thursday when protests turned violent, Amnesty International said, blaming police for using live rounds.
Protesters have said they have a right to peaceful demonstrations, calling the government's warnings of violence a smokescreen for a potential crackdown.
